Question #8892a

1 Answer
Feb 25, 2017

Answer:

The passenger's velocity is indeterminate from the information given (no direction).
The passenger's speed relative to the ground is #25.0 (km)/h#

Explanation:

The train is moving at a speed relative to the ground #W = 30.0(km)/h#

The passenger is moving at a speed relative to the train #E = 5.0(km)/h#

To calculate the relative speed of the passenger to the ground, #PGS# we would add his speed to the speed of the train relative to the ground.

#PGS = W + E#

But here the direction of travel for the passenger is opposite that of the train, so his speed becomes a negative value.

#PGS = W - E#

#PGS = 30.0 - 5.0 = 25.0(km)/h#

If the train were to be travelling north at this moment, the passenger would be travelling at a #velocity 25.0(km)/h# north relative to the ground.